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This work investigates the challenge of learning and reasoning for Commonsense Question Answering given an external source of knowledge in the form of a knowledge graph (KG). We propose a novel graph neural network architecture, called…

Computation and Language · Computer Science 2022-09-22 Chen Zheng , Parisa Kordjamshidi

Knowledge graph (KG) question generation (QG) aims to generate natural language questions from KGs and target answers. Previous works mostly focus on a simple setting which is to generate questions from a single KG triple. In this work, we…

Computation and Language · Computer Science 2023-05-02 Yu Chen , Lingfei Wu , Mohammed J. Zaki

The field of education has undergone a significant transformation due to the rapid advancements in Artificial Intelligence (AI). Among the various AI technologies, Knowledge Graphs (KGs) using Natural Language Processing (NLP) have emerged…

Artificial Intelligence · Computer Science 2023-10-19 Zeju Li , Linya Cheng , Chunhong Zhang , Xinning Zhu , Hui Zhao

Knowledge Graphs are increasingly becoming popular for a variety of downstream tasks like Question Answering and Information Retrieval. However, the Knowledge Graphs are often incomplete, thus leading to poor performance. As a result, there…

Computation and Language · Computer Science 2020-07-27 Siddhant Arora

We propose a novel framework to enable Knowledge Graphs (KGs) sharing while ensuring that information that should remain private is not directly released nor indirectly exposed via derived knowledge, maintaining at the same time the…

Databases · Computer Science 2025-12-17 Luigi Bellomarini , Costanza Catalano , Andrea Coletta , Michela Iezzi , Pierangela Samarati

OpenStreetMap is a rich source of openly available geographic information. However, the representation of geographic entities, e.g., buildings, mountains, and cities, within OpenStreetMap is highly heterogeneous, diverse, and incomplete. As…

Information Retrieval · Computer Science 2021-09-22 Alishiba Dsouza , Nicolas Tempelmeier , Ran Yu , Simon Gottschalk , Elena Demidova

Personalized recommendations are popular in these days of Internet driven activities, specifically shopping. Recommendation methods can be grouped into three major categories, content based filtering, collaborative filtering and machine…

Information Retrieval · Computer Science 2021-01-11 Yuhao Mao , Serguei A. Mokhov , Sudhir P. Mudur

Most Knowledge Graphs (KGs) contain textual descriptions of entities in various natural languages. These descriptions of entities provide valuable information that may not be explicitly represented in the structured part of the KG. Based on…

Computation and Language · Computer Science 2020-04-23 Genet Asefa Gesese , Mehwish Alam , Harald Sack

Knowledge graphs (KGs) are valuable for representing structured, interconnected information across domains, enabling tasks like semantic search, recommendation systems and inference. A pertinent challenge with KGs, however, is that many…

Computation and Language · Computer Science 2024-12-17 Haji Gul , Abdul Ghani Naim , Ajaz A. Bhat

Graph neural networks have been widely used for learning representations of nodes for many downstream tasks on graph data. Existing models were designed for the nodes on a single graph, which would not be able to utilize information across…

Machine Learning · Computer Science 2021-06-04 Meng Jiang

Knowledge Graphs (KGs) have shown great success in recommendation. This is attributed to the rich attribute information contained in KG to improve item and user representations as side information. However, existing knowledge-aware methods…

Information Retrieval · Computer Science 2021-12-20 Zepeng Huai , Jianhua Tao , Feihu Che , Guohua Yang , Dawei Zhang

Navigating, visualizing, and discovery in graph data is frequently a difficult prospect. This is especially true for knowledge graphs (KGs), due to high number of possible labeled connections to other data. However, KGs are frequently…

Human-Computer Interaction · Computer Science 2025-08-12 Antrea Christou , Cogan Shimizu

With knowledge graphs (KGs) at the center of numerous applications such as recommender systems and question answering, the need for generalized pipelines to construct and continuously update such KGs is increasing. While the individual…

Artificial Intelligence · Computer Science 2024-09-05 Marvin Hofer , Daniel Obraczka , Alieh Saeedi , Hanna Köpcke , Erhard Rahm

Numerous Knowledge Graphs (KGs) are being created to make Recommender Systems (RSs) not only intelligent but also knowledgeable. Integrating a KG in the recommendation process allows the underlying model to extract reasoning paths between…

Information Retrieval · Computer Science 2022-11-11 Giacomo Balloccu , Ludovico Boratto , Gianni Fenu , Mirko Marras

Knowledge graph (KG) embedding encodes the entities and relations from a KG into low-dimensional vector spaces to support various applications such as KG completion, question answering, and recommender systems. In real world, knowledge…

Databases · Computer Science 2022-06-02 Tianxing Wu , Arijit Khan , Melvin Yong , Guilin Qi , Meng Wang

In this paper we provide a comprehensive introduction to knowledge graphs, which have recently garnered significant attention from both industry and academia in scenarios that require exploiting diverse, dynamic, large-scale collections of…

The current knowledge system of macroeconomics is built on interactions among a small number of variables, since traditional macroeconomic models can mostly handle a handful of inputs. Recent work using big data suggests that a much larger…

General Economics · Economics 2020-10-13 Yucheng Yang , Yue Pang , Guanhua Huang , Weinan E

An important task for Homeland Security is the prediction of threat vulnerabilities, such as through the detection of relationships between seemingly disjoint entities. A structure used for this task is a "semantic graph", also known as a…

Artificial Intelligence · Computer Science 2007-05-23 Marc Barthelemy , Edmond Chow , Tina Eliassi-Rad

Graphs are a powerful data structure for representing relational data and are widely used to describe complex real-world systems. Probabilistic Graphical Models (PGMs) and Graph Neural Networks (GNNs) can both leverage graph-structured…

Machine Learning · Statistics 2025-08-26 Michela Lapenna , Caterina De Bacco

Traditional recommender systems estimate user preference on items purely based on historical interaction records, thus failing to capture fine-grained yet dynamic user interests and letting users receive recommendation only passively.…

Information Retrieval · Computer Science 2023-05-02 Xuhui Ren , Tong Chen , Quoc Viet Hung Nguyen , Lizhen Cui , Zi Huang , Hongzhi Yin